Open Access
Table 2
Results of linear regression fit of TSI versus dark sunspot and bright facular signals using SFO/CFDT2 sunspot data and varying the facular signals.
| CFDT2 comparisons of 2-component TSI models | |||
|---|---|---|---|
| Feature identification method | Photometric sum method | ||
| Regression components | R2, A, B, C | Regression components | R2, A, B, C |
| SDO 160 nm (812 data points) | |||
| (sunspot deficit + cfdt1 K) | R2 = 0.8267 | (Σr + cfdt1 ΣK) | R2 = 0.8819 |
| A = 1360.723, B = 0.0019, C = 0.000240 | A = 1360.612, B = 0.00137, C = 0.000153 | ||
| (sunspot deficit + composite K) | R2 = 0.8364 | (Σr + composite ΣK) | R2 = 0.8848 |
| A = 1360.702, B = 0.00199, C = 0.000247 | A = 1360.669, B = 0.00137, C = 0.000158 | ||
| (sunspot deficit + cfdt2 K) | R2 = 0.8337 | (Σr + cfdt2 ΣK) | R2 = 0.8809 |
| A = 1360.724, B = 0.00198, C = 0.000260 | A = 1360.673, B = 0.00136, C = 0.000165 | ||
| (sunspot deficit + SDO 160) | R2 = 0.7237 | (Σr + SDO Σ160) | R2 = 0.8155 |
| A = 1358.685, B = 0.00165, C = 1.66E−5 | A = 1359.689, B = 0.00144, C = 1.39E−5 | ||
| SDO 170 nm (782 data points) | |||
| (sunspot deficit + cfdt1 K) | R2 = 0.8278 | (Σr + cfdt1 ΣK) | R2 = 0.8822 |
| A = 1360.723, B = 0.00199, C = 0.000240 | A = 1360.612, B = 0.00137, C = 0.000153 | ||
| (sunspot deficit + composite K) | R2 = 0.8374 | (Σr + composite ΣK) | R2 = 0.8851 |
| A = 1360.702, B = 0.00199, C = 0.000248 | A = 1360.670, B = 0.00137, C = 0.000165 | ||
| (sunspot deficit + cfdt2 K) | R2 = 0.8347 | (Σr + cfdt2 ΣK) | R2 = 0.8812 |
| A = 1360.724, B = 0.00198, C = 0.000260 | A = 1360.675, B = 0.00137, C = 0.000165 | ||
| (sunspot deficit + SDO 170) | R2 = 0.8536 | (Σr + SDO Σ170) | R2 = 0.8912 |
| A = 1357.985, B = 0.0018, C = 2.69E−5 | A = 1359.500, B = 0.00150, C = 2.092E−5 | ||
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